Mechanical speed-indicator.



No. 821,864. '7 PAT-ENTED MAY 29, 1906.

MECHANICAL SPEED INDICATOR.

APPLICATION FILED SEPT. 12', 1903.

2 SHEETSSHBET 1.

No. 821,804. PATENTED MAY 29,1906.

T. HOOKER.

MECHANICAL SPEED INDICATOR. APPLICATION FILED SEPT. 12, 1903.

2 SHEETS-SHEET 2.

. n STATES Parana was.

rue-Mas scones, or srsacosa, NEW roan.

' Meal-inmost sPEEo-moioaros.

To ML whom it may concern:

- Be it known that I, THoMAs'HooKER, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Mechanical Speedlndicators, of which the following, taken'in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to improvements in mechanical speed-indicators in which the comparative speed of a revolving element is first indicated with reference to a predetermined or normal speed requirement and the actual speed is then ascertained through the medium of a manually-adjusted differentialspeed mechanism coacting with the revolving element and a suitable registering device, as a cyclometer, The primary object of this invention is to' enable the operator to ascertain the comparative or actual speed of any revolving part or parts and to automatically register such speed without reference to any timeindicating device, such as a watch or clock, so that the indicated speed as re istered may be referred to after the device as been.re' moved from the part being tested. v

Other objects will appear in the following description.

In the drawings, Figure 1 is a top plan my improved sp.eedindicator, a part of, the,

1 being broken away for disclosing the top wa underlying mechanism. Figs. 2, 3, ahd 4 are. sectional views taken, respectively, on lines 2 2, Fig. 1, and 3 3 and 4 4, Fig.2. Figs. 5 and 6 are sectional views taken, respectively, on lines 5 5 and 6 6, Fig. 1. Fig. 7 is a detail view of a s eed multiplying and reducing attachment or the main driving-s indle.

Similar reference characters in icate corresponding parts in all the views. In carrying out the objects stated a revoluble driving shaft or spindle 1 is journaled at its outer end in a bearing 2 in one ,of the side walls of an inclosing case or supportingframe 3, and its inner end is seated in a bearing 4 in the side of an .upright standard 5, which rises from the base or bottom of the case. This spindle is held from endwise movement by any ,Well-known means, and its outer end isprovided with a clutch section or collar 6, into which is inserted one end of a spur 7, the latter being applied to the revolving' part the speed of which is to be ascertained. p

a friction wheel ordisk 8 is feathered on Specification of Letters latent. A u i 515d September 12.1903. Serial 110.172.1303.

iatenteu ma 29, 1906.

y l the s indle 1 to rotate therewith and is frictiona y engaged with a similar but larger friction disk or wheel 9 for transmittin re-.

tar motion to the latter. The axes-o the dis s 8 and 9 are disposed at substantially right angles to each other, and in this instance the periphery of the disk 8 is in frictional contact with the lower face of the disk 9 at one side of its axis. ed on a spindle 10, having its lower end stepped in a bearing in the upper end of the standard 5, and its up er end extends above The disk 9 is mount- 1 the disk 9 and is seate in an axially-movable bearing, as asliding rod 11. This sliding rod or bearing 11 is fguided in an o ening 12 in the upper wall 0 the case 3 an endwise in one direction, as outwardly, by one or more centrifuga'lly-o erated levers or arms 13, which are mounte upon and rotate with the disk 9 and uponwhich the lower end of the sliding rod 11 rests.

The levers 13 arefulcrumed on the disk. 9 at opposite sides of its axis and are suitably weighted, so as to move automatically toward and from the axis of revolution. as the disk is revolved, the amount of throw depending upon the speed of revolution. This centrifugal motion of the weighted ends of the levers causes the elevation or outward thrust o the plunger-rod 11 against the action or a spring-arm 14, which bears against the outer is actuated end of said rod and operates to return the latter and also the weighted lovers to their starting positions when the centrifugal force is less than the counteracting force of the the tension of the spring being regusprings lated y anyi sultable means, as an adjustmgscrew 15. his motion which is imparted to the spring 14 by the centrifugal members is utilized to actuate an indicator-finger 16 along a suitable dial 17, and this is accomplished through the medium. of a rock-lever 1 8 and a rack and pinion 20 and 21, so that when the disk 9 is revolved at a predetermined or normal speed the finger 16 will re ister with the zero graduation of the dish.

The finger 16 and dial 17 are of course ex- 2 posed to view andare here shown as located uponahd above the top of the case 3, the finger 16 having one end secured to a vertical rock-shaft or spindle 22, which is journaled in the top wall of the'case and carries the pin- 1 pinion 2i and is formed on one end of a lever,

' which hilcrnmed at 23, while the opposite end of said. lever is on -a red bv one arm of the b r. lever 18, the other end bearing on the free end of the spring 14.

It is now apparent that when the spur 7 is lied to a rotatin 'elemont sinular rotar motion will be im arted to the disk 9 throu 1 I i a b the medium oi the spindle 1 and disk 8 and that the weighted ends of the levers 13 will he threw). or moved radnillv a distance )roportionate to the speed oi revolution of the disk 9, w nch centritugal throw operates the 1ndcx.- finger 1 along the dial 17 through the medium oi the plunger 1 1 spring 14, lever 18, and rack and pinion 2n and '21. The

weighted. levers i3 and spring 14 are adjusted so that when the disk 8 is in its innern'iost positionand revolved at a certain speed-in this instance two hundred revolutions per minute-it will cause the disk 1) to also re 'volvc at a certain speed, knownas the constant or normal speed, which in turn will cause the finger 16 to move to a certain position or point relatively to the dial. This point is marked naught, 0-,) and when the finger 16 is brought into registration-with this point it indicates that the disk 9 is runningat a constant or normal speed, while the speed of. the disk 8, which is the speed ol the part being tested, is of course variable. In order to maintain this constant or normal speed of the disk 9, the disk 8 movable axi ally at the will of the operator by means of a screw 24 and nut 25, the screw being journaled in the sides of thecase, and is provided with a handpiece 2e, while the nut 25 is mounted on a screw and engaged with groove in the hub 1.9 of the disk 8, so thatby rotating the screw the nut and disk are moved axially toward and. from the axis of the disk 9 to change the point of contact betweenthe two disks. It will now be seen that when the disk'S is'moved to its extreme outer posi tion or pointof contact with the disk 9 it Will require a certain speed. greater than the two hundred revolutions per minute previously mentioned of the disk 8 to bring the disk 9 to its normal speed and to thereby cause the finer 16 to move to the zero point on the dial. The ratio of distances of the disk 8 in its extrerne inner and outer positions irom the axis of the disk is in this instance one to five, and therefore if it requires two hundred revolutions per minute of the disk 8 when in its innermost position to bring the finger 16 to the zero-point it will require one thousand.

revolutions per minute of said disk when in its extremev outer position to produce the same result, and these two speeds represent the maximum capacity of the device without the use of a multiplier and reducing attachment, presently described.

Therotationof the screw 24 in moving the disk 8 axially to maintain a constant or normal speed for the disk 9 is utilized to actuate the cyclometer 29 through the medium. of suitable intermeshing gears 27 and 28, which, together with the mechanism of the cyclonictor, are adjusted so that when the disk 9 is broughtto its normal speed the actual speed of the disk 8 and part being tested is indicated in figures by the cyclometer. -For eX- ample, il it requires a speed of two hundred. revolutionsper minute of the disk 8 to bring the disk i) to its normal speed the cyclometer is caused to register 200, or if the speed of the disk 8 is live hundred revolutions per minute the rotation of the screw 24 to shift the disk 8 axially so as to again bring the disk 9 to its normal speed would cause the cycloi'neter to register 500. In like manner any speed of a revolving part Within the capacity of the device is indicated in figures b y the cyclometer through the medium of the screw 24 and its connections with the parts of the cyclometer.

in some instances the speed-of the part being tested maybe above or below the capacity of the device just described, and I therefore I provide a multiplying and reducing attachment 30, Fig. 7, which in this instance consists of a sectional spindle 31, the spindle-sections having a common axis,but are rotatable at dill'crent speeds, and either may be applied to the coupling-section of the'spindle 1 while the other receives the spur 7. The sections of the spindle 31 are provided with gears 32 and 33 of different sizes, which mesh, respectivcly, with gears 34 and 35 on a second spindle 36, these gears 34 and 35 being also of unequal size, .and the smaller gears of each spindle mesh with the larger gears of the other spindle. are of such itch as to increase or diminish the s )eed of the s indie 1 above or below the speed of the revo ving part by a definite factor-in this instance 5-so that when the sec tion 33 is applied to the revolving )art the speed of which is to be tested and t e other section is applied to the spindle 1 the latter is log rotated five times as fast as said revolving part, while, on the other hand, when the disposition of the sections 32 and 33 is reversed the speed of the spindle 1 is reduced to one fifth of the speed of said revolving part. It will now be seen that the ratio between the highest and lowest speeds of the diskS with-- out the multiplying and reducing attachment is the same as the ratio between the two speeds of said attachment and that in ascertaining the actual speed of any revolving element it is first necessary to adjust the screw 24 and disk 8 so as to bring the disk 9 to its normal speed, which normal speed is ascertained in the manner hereinbefore described.

In the operation of my invention the device is taken in hand by the operator and the spur I applied to the revolving partthe zero-point on the dial, and in order to cause this speed is one-fifth of the actual speed of ute-then the section of the spindle 31 havspeed of iorty revolutions per minute the the dial 17. Now suppose the isk 9 is retwo with the zero graduation on the dial.

out the use of the multiplying and reducing the finger 16 re 'stering with the zero-mark "the mu causes the spindle 1 and disk 8 to revolve at the same speed as the revolving part, and therefore transmits rotary motion to the disk 9 which in turn operates the fin er 16 along volved-at a speed above its normal speed, which in this instance would indicate that the s eed of the part being tested was above hundred revolutions per minute, this would cause the finger 16 to pass beyond the the cyclometer 29 to register the actual speed of-the part being tested it will be necessary to' adjust the screw 24 to bring the disk 8 to such' 'a osition as would reduce the speed of the dis 9 until the finger 16 was registegpd T is rotation of the screw would actuate the cyclometer and produce a reading in figures which would indicate the actual speed of the revolving element. In like manner. any speed between two hundred and one thousand revolutions er minute is indicated in figures. by the eye ometer Without the use of the multiplying and reducing attachment. Now assuming that the speed of the revolving part to be tested is greater than the capacity of the apparatus-say, for instance, two thousand revolutions-per minute, withattachment-then the section of the spindle 31 having the ear 32 is connected to the spindle 1, and t -e s ur 7- is connected to the section of the spindlb 81 having the gear 32. If the spur 7 is now'applied to the revolving part running two thousand revolutions per minute, it is evident that the spindle 1 will be rotated one-fifth of two thousand revolutions per minute, or four hundred revolutions per minute, as the ratio. of the speeds of the two sections of the spindle 31, in this instance as five to one. The screw 24 is now rotated to adjust the disk 8 so as to cause the disk 9 to revolve at its normal speed, as indicated by on the dial. hisflrotation of the screw would cause the c clometer to read 400 that is, the spee of the spindle l-and as the revolving part being tested said actual speed .ma be obtained by multiplying the reading 0 the cyclometcr by five. On the other hand, assuming that the speed of the revolving part being tested is less than the capacity of the apparatus without theuseof tiplying and reducing attachment 1 as, for example, forty revolutions per mining the gear. 32 is connected to the spindle 1 and the spur 7 is coupled to the section of the spindle 31 having the gear 33. Now if this. spur is ap lied to the revolving part with a spindle 1' will be rotated five times as fast as the spur or two hundred revolutions per minute, and the screw 24 is then rotated to adjust the disk 8 until the disk 9 is brought to its normal speed, indicated by the finger 16 re istering With the zero-mark on the dial, and t 's rotation of the screw will cause the cyclometer to read 200, or the speed of the spindle. 1, and as this speed is five times as great as the actual speed of the part being tested such actual speed may be 0 tained by dividing the reading of the cyclometer, as 200, by five, which will give forty revolutions per minute, or the actual speed of the part being tested.

Having described my invention, what I claim,'and desire to secure by Letters Patent, IST- 1. A mechanical speed-indicatorv comprising a revolvin element having an independent centrifugalmovement pro need by its rotation, means actuated by the centrifugal movement of said element to indicate its speed of rotation, variable-speed driving means to rotate said element,-and manuallyoperated means for adjusting said driving means to cause said element to revolve at a constant speed.

2. A speed-indicator comprising a revolv ing element having an independent centrifugal movement, variable-speed driving means to rotate said element, manually-operated means for adjusting said'driving means to cause-said element to revolve at a constant speed, and'a movable index-finger operatively connected to said element and actuated by its centrifugal movement.

3. A speed-indicatorcomprising a revolving disk and variable'speed driving means therefor adjustable to keep said disk at a conv stant speed, a centrifrigallynctuated element on the disk a plunger actuated by said element and an indicating-finger operatively connected to and actuated by said plunger.

5 A. speed-indicator comprising a revolving disk and variable-speed driving means therefor and adjustable to keep said disk at a constant.speed-,,-a centrifugally-actuated elemeat on the disk, a plunger actuated by said element and means actuated by the lunger,

to indicate the'speed of rotation of t is disk.

6. A mechan'ical speed-indicator comprising a' revolvin element having an independent centrifuge movement produced by its rotation, a plunger actuated by the centrifugal movement" of' said "element, variable-speed driving means movable axiallyto keep the revolving element at a constant speed, man- -ually-operated means for adjusting said driv ing means axially, and means actuated by 13 the plunger to indicate the speed of such rotation.

'7, A. speedandioator comprising a revolts ble element having an independent oentrifw gal movement, a spring connected to act against such movement, means for adjusting the tension of the spring, variable-speed driving means to rotate said element and to cause it to rotate at a constant speed, and'an indexlinger operatively connected to and actuated by said element to indicate said constant speed.

8. A. speed'indicator comprising a revolving disk and variable-speed driving means ipeed, a centrihigaily-operated element ,e disk and actuated by its rotation, a 1 c indicating inf iber operatively conted to and actuat y the centrifugal-ly- 4 ated element to 1 ate said constant speed and means to return said element to its normal position.

9. In a speed-indicator the combination of a rotary disk, a variable-speed driving-disk fri'ctionally engaged with the former disk and adjustable axially to bring the former disk to a constant speed, a centrifugally-operated element carried by the former disk and actuated by its rotation, a plunger actuated by said element, and an index-finger operatively connected to and actuated by the plunger to indicate said constant speed.

10. In a speed-indicator the combination of a rotary disk, a variable-speed driving-disk frictionally engaged with the former disk and adjustable axially to bring the former disk to a constant speed, a centrifugally-operated' element carried by the former disk and actuated by its rotation, a plunger actuated by said element, and an index-finger operatively connected to and actuated by the plunger to indicate said constant speed, and a spring for retracting the plunger.

11. A speed-indicator comprising a revolving element having an independent centrifugal movement, variable-speed driving mechanism for rotating said element, said mechanism being ustable to bring the revolving element to a constant speed, manually-operated means for adjusting said driving mechanism and a movable indicating member operatively connected to and actuated by said revolving element to indicate such constant speed.

12. ing member operable under variable speeds and a driven member actuated thereby, and manually-operated means for adjusting the driving member to cause the driven member to rotate at uniform normal speed.

13. A speed-indicator comprising a revolving element having an independent centrifugal movement, variable-speed driving mechanismior rotating said element, manually-' operated means connected to dhang'e the. po-

th refor adjustable to bringthe disk to a con A speed-indicator, comprising a driv-' serene sition of the driving means to vary the speed of said element, an index-finger connected to and actuated by said element, and an index operatively connected to and actuated by the n1anually-operatedtmeans.

14. A speed-indicator comprising two rotary disks in frictional contact, one driving the other, the driving-disk being movable endwise to change the position of contact and to vary the speed of the driven dish, at Bentrii'ugally-o pe rated. element on the driven disk and an indicating member operatively connected to and actuated thereby, a screw connected to shift the drivi '-disk, and a cyclonieterconnected to aiid actuated by the screw.

15. A speed-indicator comprising'a revolving disk and operating means therefor, a cen triin all actuated element on the disk and n 1 7 movable indicating member operatively connected to and actuated by said element, a manuaily-' )perated screw connected to. shift the position of the dirk, operating means to change the speed of rotation of the disk and a cyclometer actuated. by the screw, for the purpose set forth. 16. In a speed-'ndicator, a variable-speed driving member and a rotar driven member, one-member being adj usta le at the will of the operator relatively to the other to keep manually-operated means for adjusting said adjustable member. s

17. In a speed-indicator, a variable-speed driving'member, and a rotar driven member, one member being adjusta le relativelyto the other at the will of the operator to keep the driven member at aconstant speed, manually-operated means to adjust said adjustable member, and means to indicate when the driven member is revolved at a constant speed.

18. In a speed-indicator, a variable-speed driving member and a rotary driven member, one member being adjustable relatively to the other at the will of the operator to kee the driven member at a constant spee means to adjust the adjustable member and a speed-registering device actuated by said means.

19. In a s ed-indicator, 'a variable-speed driving mem er and a rotary driven member, one member being ad'ustable relatively to. the other at the will of t e operator to keep the driven member at a constant speed, manuallyoperated means to adjust said adjustable member, and means actuated by thedriven member to indicate when it is revolving at a constant speed.

.the driven member at a constant speed and,

be tested,

indg at a constant s eed, additional means to a gust the adjusta 1e member, anda speedin icating device actuated by the additional means.

21. In a speed-indicator, a variable-speed driving member and Ta rotary driven member, one member being adjustable relatively to the other at the will of the operator to keep the driven member at a constant speed and manually-eperated'means for adjusting said adjustable member in combination with a multiplying attachment operatively connected to the driving member and adapted to be appliedto the'part, the speed of which is to 22. In a speed-indicatorfa variable-speed driving member and a rotary driven member, one member being adjustable relativeiy to the other at the Wiil of the operator to keep the driven member at a constant speed manually-operated means for adjusting said adjustable member; a speedm'iultipiying de vice operatively connected to the driving member and adapted to be applied to the part, the speed of which is to be tested and means broiight into action by th djustment of themanually-adjustable memoer ind-i eate such speed. I

In witness whereof I have iiereunte set in hand on this 8th day of September, 1903.

THGMAS HGUIQER.

Witnesses: I

J. M. HAMMEKEN.

and 

